Many students suffer from math anxiety. Biostatistics lecturer offered his students a 2-hour lecture on math anxiety and ways to overcome it. The following table gives the test score for 7 students before and after they attended the lecture. Test at 5% significance level whether attending this lecture increases the score in Biostatistics. Before 56 69 48 74 65 71 60 After 62 73 44 85 71 70 73
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
Many students suffer from math anxiety. Biostatistics lecturer offered his students a 2-hour lecture on math anxiety and ways to overcome it. The following table gives the test score for 7 students before and after they attended the lecture. Test at 5% significance level whether attending this lecture increases the score in Biostatistics.
Before
56
69
48
74
65
71
60
After
62
73
44
85
71
70
73
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